Why do traffic lights still have three lights? | Car

Auto editor Niek Schenk replies: ‘This can certainly have advantages. But don’t forget that the familiar position of three colors in different positions helps to recognize when you see a red, orange or green light. Colorblind people have already been helped with it.’

‘Of course you can come up with solutions for this, for example by depicting a different symbol in the lamp for each colour. But it seems risky to me to change this: everyone is used to this now. To avoid confusion, it should actually be adjusted worldwide at once. That is quite a challenge and costs a lot of money.’

Our car editor Niek Schenk answers reader questions every week. Mail your question to [email protected]

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